diff --git a/CHANGELOG.md b/CHANGELOG.md
index a89eafd9b..edc1cc12d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -57,6 +57,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Improvements
 
+- [#413](https://github.com/alleslabs/celatone-frontend/pull/413) Add jest test cases for date utils
 - [#404](https://github.com/alleslabs/celatone-frontend/pull/404) Use internal navigate instead of app link for block navigation
 - [#396](https://github.com/alleslabs/celatone-frontend/pull/396) Refactor useConfig, disable wasm related tabs on the public project page
 - [#392](https://github.com/alleslabs/celatone-frontend/pull/392) Refactor proposal table and fix empty state of the proposal list table
diff --git a/package.json b/package.json
index 2f55c8500..d1fde484a 100644
--- a/package.json
+++ b/package.json
@@ -95,6 +95,7 @@
     "husky": "^8.0.1",
     "jest": "^29.5.0",
     "lint-staged": "^13.0.3",
+    "mockdate": "^3.0.5",
     "next-sitemap": "^3.1.25",
     "prettier": "^2.7.1",
     "standard-version": "^9.5.0",
diff --git a/src/lib/utils/date.test.ts b/src/lib/utils/date.test.ts
new file mode 100644
index 000000000..3b3e5af30
--- /dev/null
+++ b/src/lib/utils/date.test.ts
@@ -0,0 +1,219 @@
+/* eslint-disable sonarjs/no-duplicate-string */
+import MockDate from "mockdate";
+
+import {
+  getDefaultDate,
+  getCurrentDate,
+  parseDate,
+  parseDateOpt,
+  parseDateDefault,
+  formatUTC,
+  dateFromNow,
+  formatSeconds,
+} from "./date";
+
+const MOCK_CURRENT_ISO = "2026-06-06T06:00:00.000Z";
+const DEFAULT_ISO = "1970-01-01T00:00:00.000Z";
+
+beforeEach(() => {
+  MockDate.set(new Date(MOCK_CURRENT_ISO));
+});
+
+afterEach(() => {
+  MockDate.reset();
+});
+
+describe("getDefaultDate", () => {
+  test("should correctly return default date", () => {
+    expect(getDefaultDate().toISOString()).toEqual(DEFAULT_ISO);
+  });
+});
+
+describe("getCurrentDate", () => {
+  test("should correctly return current date", () => {
+    expect(getCurrentDate().toISOString()).toEqual(MOCK_CURRENT_ISO);
+  });
+});
+
+describe("parseDate", () => {
+  test("should correctly parse date from string", () => {
+    let d = "2018";
+    expect(parseDate(d).toISOString()).toEqual("2018-01-01T00:00:00.000Z");
+    d = "2018-04";
+    expect(parseDate(d).toISOString()).toEqual("2018-04-01T00:00:00.000Z");
+    d = "2018-04-24";
+    expect(parseDate(d).toISOString()).toEqual("2018-04-24T00:00:00.000Z");
+    d = "2018-04-24 11:12";
+    expect(parseDate(d).toISOString()).toEqual("2018-04-24T11:12:00.000Z");
+    d = "2018-05-02 11:12:13";
+    expect(parseDate(d).toISOString()).toEqual("2018-05-02T11:12:13.000Z");
+    d = "2018-05-02 11:12:13.998";
+    expect(parseDate(d).toISOString()).toEqual("2018-05-02T11:12:13.998Z");
+    d = "2018036187";
+    expect(parseDate(d).toISOString()).toEqual("2018-05-03T15:00:00.000Z");
+  });
+});
+
+describe("parseDateOpt", () => {
+  test("should correctly parse date from string", () => {
+    let d = "2018";
+    expect(parseDateOpt(d)?.toISOString()).toEqual("2018-01-01T00:00:00.000Z");
+    d = "2018-04";
+    expect(parseDateOpt(d)?.toISOString()).toEqual("2018-04-01T00:00:00.000Z");
+    d = "2018-04-24";
+    expect(parseDateOpt(d)?.toISOString()).toEqual("2018-04-24T00:00:00.000Z");
+    d = "2018-04-24 11:12";
+    expect(parseDateOpt(d)?.toISOString()).toEqual("2018-04-24T11:12:00.000Z");
+    d = "2018-05-02 11:12:13";
+    expect(parseDateOpt(d)?.toISOString()).toEqual("2018-05-02T11:12:13.000Z");
+    d = "2018-05-02 11:12:13.998";
+    expect(parseDateOpt(d)?.toISOString()).toEqual("2018-05-02T11:12:13.998Z");
+    d = "2018036187";
+    expect(parseDateOpt(d)?.toISOString()).toEqual("2018-05-03T15:00:00.000Z");
+  });
+  test("should correctly return undefined for undefined/falsy parameter", () => {
+    // undefined and falsy cases
+    expect(parseDateOpt(undefined)).toBeUndefined();
+    expect(parseDateOpt("")).toBeUndefined();
+  });
+});
+
+describe("parseDateDefault", () => {
+  test("should correctly parse date from string", () => {
+    let d = "2018";
+    expect(parseDateDefault(d).toISOString()).toEqual(
+      "2018-01-01T00:00:00.000Z"
+    );
+    d = "2018-04";
+    expect(parseDateDefault(d).toISOString()).toEqual(
+      "2018-04-01T00:00:00.000Z"
+    );
+    d = "2018-04-24";
+    expect(parseDateDefault(d).toISOString()).toEqual(
+      "2018-04-24T00:00:00.000Z"
+    );
+    d = "2018-04-24 11:12";
+    expect(parseDateDefault(d).toISOString()).toEqual(
+      "2018-04-24T11:12:00.000Z"
+    );
+    d = "2018-05-02 11:12:13";
+    expect(parseDateDefault(d).toISOString()).toEqual(
+      "2018-05-02T11:12:13.000Z"
+    );
+    d = "2018-05-02 11:12:13.998";
+    expect(parseDateDefault(d).toISOString()).toEqual(
+      "2018-05-02T11:12:13.998Z"
+    );
+    d = "2018036187";
+    expect(parseDateDefault(d).toISOString()).toEqual(
+      "2018-05-03T15:00:00.000Z"
+    );
+  });
+  test("should correctly return default value for undefined/falsy parameter", () => {
+    // undefined and falsy cases
+    expect(parseDateDefault(undefined).toISOString()).toEqual(DEFAULT_ISO);
+    expect(parseDateDefault("").toISOString()).toEqual(DEFAULT_ISO);
+  });
+});
+
+describe("formatUTC", () => {
+  test("should correctly format date to UTC string", () => {
+    let d = parseDate("2018");
+    expect(formatUTC(d)).toEqual("Jan 01, 2018, 12:00:00 AM (UTC)");
+    d = parseDate("2018-04");
+    expect(formatUTC(d)).toEqual("Apr 01, 2018, 12:00:00 AM (UTC)");
+    d = parseDate("2018-04-24");
+    expect(formatUTC(d)).toEqual("Apr 24, 2018, 12:00:00 AM (UTC)");
+    d = parseDate("2018-04-24 11:12");
+    expect(formatUTC(d)).toEqual("Apr 24, 2018, 11:12:00 AM (UTC)");
+    d = parseDate("2018-05-02 11:12:13");
+    expect(formatUTC(d)).toEqual("May 02, 2018, 11:12:13 AM (UTC)");
+    d = parseDate("2018-05-02 11:12:13.998");
+    expect(formatUTC(d)).toEqual("May 02, 2018, 11:12:13 AM (UTC)");
+    d = parseDate("2018036187");
+    expect(formatUTC(d)).toEqual("May 03, 2018, 3:00:00 PM (UTC)");
+  });
+});
+
+describe("dateFromNow", () => {
+  test("(Past) should correctly get date from now", () => {
+    // Past
+    let d = parseDate("2026-06-06T05:59:30.000Z");
+    expect(dateFromNow(d)).toEqual("a few seconds ago");
+    d = parseDate("2026-06-06T05:59:00.000Z");
+    expect(dateFromNow(d)).toEqual("a minute ago");
+    d = parseDate("2026-06-06T05:30:00.000Z");
+    expect(dateFromNow(d)).toEqual("30 minutes ago");
+    d = parseDate("2026-06-06T05:00:00.000Z");
+    expect(dateFromNow(d)).toEqual("an hour ago");
+    d = parseDate("2026-06-06T00:00:00.000Z");
+    expect(dateFromNow(d)).toEqual("6 hours ago");
+    d = parseDate("2026-06-05T06:00:00.000Z");
+    expect(dateFromNow(d)).toEqual("a day ago");
+    d = parseDate("2026-05-31T06:00:00.000Z");
+    expect(dateFromNow(d)).toEqual("6 days ago");
+    d = parseDate("2026-05-06T06:00:00.000Z");
+    expect(dateFromNow(d)).toEqual("a month ago");
+    d = parseDate("2025-12-06T06:00:00.000Z");
+    expect(dateFromNow(d)).toEqual("6 months ago");
+    d = parseDate("2025-06-06T06:00:00.000Z");
+    expect(dateFromNow(d)).toEqual("a year ago");
+    d = parseDate("2012-06-06T06:00:00.000Z");
+    expect(dateFromNow(d)).toEqual("14 years ago");
+  });
+
+  test("(Future) should correctly get date from now", () => {
+    // Future
+    let d = parseDate("2026-06-06T06:00:30.000Z");
+    expect(dateFromNow(d)).toEqual("in a few seconds");
+    d = parseDate("2026-06-06T06:00:50.000Z");
+    expect(dateFromNow(d)).toEqual("in a minute");
+    d = parseDate("2026-06-06T06:30:00.000Z");
+    expect(dateFromNow(d)).toEqual("in 30 minutes");
+    d = parseDate("2026-06-06T07:00:00.000Z");
+    expect(dateFromNow(d)).toEqual("in an hour");
+    d = parseDate("2026-06-06T12:00:00.000Z");
+    expect(dateFromNow(d)).toEqual("in 6 hours");
+    d = parseDate("2026-06-07T06:00:00.000Z");
+    expect(dateFromNow(d)).toEqual("in a day");
+    d = parseDate("2026-06-12T06:00:00.000Z");
+    expect(dateFromNow(d)).toEqual("in 6 days");
+    d = parseDate("2026-07-06T06:00:00.000Z");
+    expect(dateFromNow(d)).toEqual("in a month");
+    d = parseDate("2026-12-06T06:00:00.000Z");
+    expect(dateFromNow(d)).toEqual("in 6 months");
+    d = parseDate("2027-06-06T06:00:00.000Z");
+    expect(dateFromNow(d)).toEqual("in a year");
+    d = parseDate("2040-06-06T06:00:00.000Z");
+    expect(dateFromNow(d)).toEqual("in 14 years");
+  });
+});
+
+describe("formatSeconds", () => {
+  test("should correctly format seconds", () => {
+    let s = "1000000s";
+    expect(formatSeconds(s)).toEqual("11 days");
+    s = "86400s";
+    expect(formatSeconds(s)).toEqual("1 day");
+    s = "7200s";
+    expect(formatSeconds(s)).toEqual("2 hours");
+    s = "3600s";
+    expect(formatSeconds(s)).toEqual("1 hour");
+    s = "120s";
+    expect(formatSeconds(s)).toEqual("2 minutes");
+    s = "60s";
+    expect(formatSeconds(s)).toEqual("1 minute");
+    s = "30s";
+    expect(formatSeconds(s)).toEqual("30 seconds");
+    s = "1s";
+    expect(formatSeconds(s)).toEqual("1 second");
+    s = "0s";
+    expect(formatSeconds(s)).toEqual("0 second");
+  });
+  test("should correctly return fallback for undefined/NaN/lesser than 0 parameter", () => {
+    expect(formatSeconds(undefined)).toEqual("N/A");
+    expect(formatSeconds("")).toEqual("N/A");
+    expect(formatSeconds("ABCDEs")).toEqual("N/A");
+    expect(formatSeconds("-1s")).toEqual("N/A");
+  });
+});
diff --git a/src/lib/utils/date.ts b/src/lib/utils/date.ts
index 89173bbee..70600dd90 100644
--- a/src/lib/utils/date.ts
+++ b/src/lib/utils/date.ts
@@ -27,9 +27,10 @@ export const formatUTC = (date: Date) =>
 export const dateFromNow = (date: Date) => dayjs.utc(date).fromNow();
 
 export const formatSeconds = (sec: Option<string>) => {
-  if (!sec) return "N/A";
+  if (sec === undefined || Number.isNaN(parseInt(sec, 10))) return "N/A";
   const formatSec = big(sec.replace("s", ""));
 
+  // TODO: use `pluralize` here
   switch (true) {
     case formatSec.gte(86400): {
       const days = formatSec.div(86400).round(0, 0).toNumber();
@@ -43,7 +44,9 @@ export const formatSeconds = (sec: Option<string>) => {
       const mins = formatSec.div(60).round(0, 0).toNumber();
       return `${mins} minute`.concat(mins > 1 ? "s" : "");
     }
+    case formatSec.lt(0):
+      return "N/A";
     default:
-      return `${formatSec.toFixed()} seconds`;
+      return `${formatSec.toFixed()} second`.concat(formatSec.gt(1) ? "s" : "");
   }
 };
diff --git a/yarn.lock b/yarn.lock
index 42b92ff7b..794e353a4 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -9781,6 +9781,11 @@ mobx@^6.6.2:
   resolved "https://registry.npmjs.org/mobx/-/mobx-6.6.2.tgz"
   integrity sha512-IOpS0bf3+hXIhDIy+CmlNMBfFpAbHS0aVHcNC+xH/TFYEKIIVDKNYRh9eKlXuVfJ1iRKAp0cRVmO145CyJAMVQ==
 
+mockdate@^3.0.5:
+  version "3.0.5"
+  resolved "https://registry.yarnpkg.com/mockdate/-/mockdate-3.0.5.tgz#789be686deb3149e7df2b663d2bc4392bc3284fb"
+  integrity sha512-iniQP4rj1FhBdBYS/+eQv7j1tadJ9lJtdzgOpvsOHng/GbcDh2Fhdeq+ZRldrPYdXvCyfFUmFeEwEGXZB5I/AQ==
+
 modify-values@^1.0.0:
   version "1.0.1"
   resolved "https://registry.npmjs.org/modify-values/-/modify-values-1.0.1.tgz"